Stop cock



Jan. 19 1926. v J. H. BRUHN ET Al.

STOP COCK Filed Feb. 27, 1925 k A ...Qn um Patented Jan. 19, 1926.

STOPI Application led February To all whom t may concern.' v

Be it known that we, JOHN H. BRUHN and AKACIUs E. litlnfrz, citizens ont the United States of America, residing at Dubuque, in the county ot Dubuque and State ot Iowa, have invented certain new and useful Iniprovements in Stop Cocks, of which the following is a specification.

Our invention relates to improvements in stop cocks or the like.

An important object of our invention to provide a device of the above mentioned character which will not be subject to accidental operation :and which will therefore be very safe and well adapted 'for use as a gas cock or the like, in which accidental operation vof the cock may be of great danger. f

Another object of our invention is the provision of a device of the above mentioned character which will be absolutelyleak proof irrespective of length of service and. wear incident thereto.

A further object of our invention is the provision of a device of lthis character which will be very simple in construction and operation, which will be inexpensive and easy to manufacture, and which will be strong and durable.

@ther objects andA advantages of our invention will be apparent during the course ot the following description.

In the accompanying drawings which form a part of this specification and wherein like characters ot reference denote like or corresponding parts throughout the same:

Figure 1 is a central vertical sectional view through a stop cock embodying our invention.

Figure 2 is a similar view taken at right angles to Figure 1,

Figure 3 is a detailsectional view, showing the operative relation of the parts,

Figure 4: is a .horizontal sectional view on the line #4 ot Figure 1, and

Figure 5 is a bottom plan view of the key section.

In the drawings wherein for the purpose of illustration is shown a preferred form of our invention, the numeral 10 designates a valve casing or body member having an inlet 11 and an outlet 12, said casing being generally conical for the major portion of its length, but having its upper end UNITED STATES PATENT`OFFICE.

JOHN H. BRUHN AND AKACIUS E. MATZ, 0F DUBUQUE, IOWA.

COCK.

27, 1925. Serial Nrn-12,014.

cylindrical. A plug 13 is generally conical in shape to correspond to the casing, but has its extreme upper end cylindrical, and is rotatively mounted in the casing, being provided with a transverse opening or port 14 which is adapted to align with the inlet and outlet 11 and 12 when the plug is ro tated. The lower end of the plug preferably terminates a trifle short of the end of the casing, and is provided with a reduced studlike extension 15 which is screwthreaded for a portion of its length and eX tends a substantial distance below the lower end of the casing.

A cap 16 is arranged over the lower end of the casing to close the same, and is pro'- vided with a peripherally extending ridge or rim 17. A coil spring 18 surrounds the studlike extension 15 and bears against the under side of the cap 16, being held in concentric relation therewith by means of the rim 17. A washer 19, having its edge turned up so as to form a cup shaped spring receiving member, is pressed against the other end of the spring by the nut 20 engaging the screwthreaded extension 15. It will be seen that the spring 18 serves to press the cap 16 into close engagement with the lower end of the casing and also to hold the plug in intimate'contact with the walls of the casing. Any wear of the plug or casing will be compensated for by the spring. It is obvious that the tension of the spring may be adjustedby means of the nut 20.

The upper end of the plug is provided with a slightly reduced extension which forms a shoulder 21, said extension being centrally slotted at 22 to form side abutments 23. A key section 24, of the same cross section as the upper end of the plug, lits withinfthe upper portion of the casing, directly over the plug. The under side of the key section is provided with a downwardly extending key or complementary abutment 25 which has its ends spaced from the periphery of the key section thereby forming a shoulder 26 corresponding to the shoulder 21. Arranged centrally of thek key section, and preferably formed integrally with the complementary abutment 25, is a downwardly extending guide pin 27 adapted to tit into the centrally located and downwardly extending opening 28 in the plug.

A coil spring 29 surrounds the abutments 2B and 25 and is thereby held against displacement. rlhe ends of the spring 29 abut against the shoulders 2l and 2G. it will be seen that a spring chamber is formed by the Walls of the casing, the abutments and the shoulder. rlhis spring serves to torce the key section away 'from the plug, as shown in Figures l and 2, and when in this p sition, the only connection is that of the guide pin which is never cntirely tree ot the opening 28 until the device is disassembled.

The key section is provided With a stem 30 which extends through an opening in the top olf the cap 3l and carries a suitable handle 72. lt Will be seen that the key sec tion, spring, plug, etc. are arranged entirely Within the valve casing` and that the cap 3l merely serves to retain the key section in place.

yflic lower end of the plug is provided with radial pin which operates in the slot its rllliis slot is so arranged as vto allow adjustment ot the plug without causing the pin to bind. "lt preferred, the cap 16 may be made large enough to cover the slot, as shown in dotted lines in Figure 2.

lt will be seen that accii'lental turning et 'the handle E52 will not operate the plug, and will therefore have no effect whatever. ln order to operate the cock, the handle must be pushed down until the key section engages the abutments on the top of the ph'ig, before turning. IThe guide pin will serve to center the key section. rl`hc arrangement ot the spring 2J around the abutments gives greater and more evenV spring tension and serves to steady the key section as well the spring. lt will be readily ap areciated that such an arrangement provides a very strong, sate, and serviceable article.

lllhile We have shown and described the pre'lerred en'ibediment ot our invention, it is to be understood that various changes in the size, shape and arrangement ot parts may be resorted to Without departing from the spirit or" our invention or the scope ot the subjoined claims.

Having described our invention What We claim and desire to protect by Letters Patent is:

l. ln a device of the character described, a valve casing, a plug rotatively mounted therein and adapted to cover and uncover the ports thereof, said plug having its upper end provided with a shoulder adjacent its peripl'iery, a key section arranged adjacent said plug and adapted to interlock therewith, said plug having a centrally arranged opening, a guide pin carried by said key section and adapted to lit Wit-hin said opening in the plug, said key section having a shoulder adjacent its peripherjg and a coil spring seated .on said shoulders and adapted to normally hold said key section and plug apart, the guide pin being adapted to engage said opening in the plug at all times.

2. ln a device ot the character described, a valve using, a plug rotativeiy mounted tlierein and adapted to cover and uncover he ports thereot', said plug having its upier end provided with a reduced extension, hereby a peripherally extending shoulder is formed, said extension being slotted to 'form tivo abutments, said plug being pro- `uu'led with a centrally arranged opening, a key section arranged above said plug and within said casing, said section being provided with a downwardly extending complementary abutment having its ends spaced from the periphery of the section tl cieby forming a shoulder adjacent said periphery, said complementary abutment being provided lvith a centrally arranged depending guide pin adapted to engage the opening in the plug at all times, and a coil spring adapted to be seated on said shoulders and surround said abutments, and adapted to normally hold the key section and plug apart, said spring being held against lateral displacement by the walls ot the casing and by the abutments. Y

3. .in a device of the character described, a valve casing, a plug rotatively mounted therein and adapted to cover and uncover the ports thereo't, said plug having its upper end provided with a reduced extension whereby a peripherally extending shoulder is formed, said extension being slotted to term two spaced abutments, a key section arranged above said plug and Within said casing, said section being provided With a downwardly extending complementary abutment having its ends spaced from the periphery of the section thereby forming a shoulder adjacent said periphery, and a coil spring adapted to be seat-ed on said shoulders and surround said abutments, said spring being adapted to normally hold the key section and plug apart, but adapted to give under pressure and allow the interitting ot the abutments, whereby the plug and key section move as one, the spring being held against lateral displacement by the walls ot the casing and by the abutments.

et. In a device ot the character described, a valve casing, a plug rotatively arranged therein, a key section arranged adjacent said plug and adapted tol interlock therewith, a coil spring adapted to engage the plug and key section adjacent their respective peripheries to normally hold them apart.. and

a guide pin carried. by the key section and engaging an opening in the plug at alll times.

ln testimony Whereot We allix our signatures.

J @HN H. BRUHN. KACIUS E. MATZ. 

